James Webb Space Telescope extends secondary mirror - BBC News
How NASA fixed Hubble's flawed vision - and reputation - CBS News
The Hubble Space Telescope (HST) (Schematic)
Hubble Space Telescope's Internal Components (Light Path)
What was wrong with Hubble's mirror, and how was it fixed? | BBC Sky at Night Magazine
Observatory - Optics | NASA
Hubble Space Telescope Backup Mirror | National Air and Space Museum
Behind James Webb Space Telescope's iconic mirror | Space
Hubble - Construction, The Hubble Mirror, Blurred Vision, Hubbles Contact Lens
NASA's James Webb Space Telescope Secondary Mirror Deploys for the First Time Using the Spacecraft Flight Electronics | Northrop Grumman
Optical Telescope Element - Wikipedia
Hubble - Construction, The Hubble Mirror, Blurred Vision, Hubbles Contact Lens
DOD Secures Critical Material for James Webb Space Telescope > U.S. Department of Defense > Story
Hubble's Mirror Flaw | NASA
Observatory - Optics | NASA
Hubble-Webb Mirror Comparison
File:Six of the 18 James Webb Space Telescope mirror segments.jpg - Wikimedia Commons
NASA finishes huge mirror for Webb Telescope
The testing error that led to Hubble mirror fiasco | New Scientist
Space telescope's beryllium mirrors
L3Harris Completes The Primary Mirror For NASA's Roman Space Telescope – SatNews
The ten-billion-dollar gamble: The JWST's magnificent mirrors – Physics World
Hubble Space Telescope Backup Mirror | National Air and Space Museum
By the dozen: NASA's James Webb Space Telesco | EurekAlert!
Telescope Primary Mirror Sizes Compared
